I need a production-ready Chrome extension that lets me apply to Backstage listings in one click, intelligently chooses the right roles for my profile, and keeps me updated wherever I am. Core workflow • The extension signs in to Backstage, pulls new listings through the Backstage API (or, where the API falls short, through puppeteer / Selenium automation). • A résumé-aware match is run for every listing. I will supply my résumé; the extension should call an LLM API, compare the job description with my skills, and score the fit before triggering the apply action. • When an application is submitted, or when a high-match role appears, the extension pushes a notification to both my mobile and desktop apps. I am open to any push service you prefer; just make sure the delivery is fast and reliable. Tech expectations JavaScript / TypeScript for the extension logic, Manifest V3 compliance, and clean modular code. Puppeteer or Selenium can handle any UI automation that the Backstage API doesn’t expose. Clear separation of concerns is important so I can later swap APIs or models. Deliverables 1. Chrome extension (packed and unpacked builds) 2. Source code with README covering setup, API keys, and build steps 3. Documentation for the LLM prompt / scoring logic 4. Notification service configuration guide 5. Short Loom or GIF demo showing a successful end-to-end apply and the two notification types firing Acceptance criteria • Auto-apply fires in under 2 s when a match score exceeds the configurable threshold. • At least 90 % of new listings retrieved within five minutes of posting. • Notifications reach both mobile and desktop devices within 10 s of submission. Share links to any similar browser automation or extension work you’ve done so I can gauge fit quickly.